This investigation compares the peritrophic membrane (PM) morphology along the midgut of susceptible (SL) and resistant (RL) Anticarsia gemmatalis larvae to the AgMNPV. The PM increased the thickness from the anterior to the posterior midgut region in both insects strain; however, the intensity of FITC-WGA reaction of the PM in the RL were greater than in SL. The PM in RL was ultrastructurally constituted by several layers of fibrous/vesicular materials in comparison with the few ones in SL. Our results showed that the structure of PM in the RL could be one of the resistance barriers to AgMNPV.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jip.2007.04.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cry1Ac toxin binding in the velvetbean caterpillar : study of midgut aminopeptidases N.
Front Physiol
October 2024
Departamento de Bioquímica, Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
Article Synopsis
- - The velvetbean caterpillar significantly affects soybean crops in Brazil, and biopesticides like Bt (Bacillus thuringiensis) utilize Crystal toxins (Cry) to kill these pests by targeting their midgut receptors, such as aminopeptidase N (APN).
- - This study aims to identify and characterize APNs in the caterpillar’s midgut to understand how Cry1Ac interacts with its receptors, which is vital for managing pest resistance against the biopesticide.
- - Research methods included immunohistochemistry, aminopeptidase activity assays, and mass spectrometry, leading to the discovery of seven APNs potentially involved in Cry toxin binding, as well as variations in expression levels
Juvenile responses to immune challenges are not carried through to subsequent life stages in an insect.
Sci Rep
September 2024
Department of Entomology, Universidade Federal de Viçosa (UFV), Av. PH Rolfs, Viçosa, Minas Gerais, 36570-900, Brazil.
Environmental variability can significantly impact individual survival and reproduction. Meanwhile, high population densities can lead to resource scarcity and increased exposure to parasites and pathogens. Studies with insects can offer valuable insights into eco-immunology, allowing us to explore the connections between these variables.
View Article and Find Full Text PDFOviposition patterns of primary lepidopteran defoliators in soybean and the impact on structured refuge recommendations.
Pest Manag Sci
November 2024
Entomology & Nematology Department, West Florida Research and Education Center, University of Florida, Jay, USA.
Background: Transgenic Bt technology in soybean, with plants expressing Cry1Ac, has been adopted as an insect pest management tool. It was first adopted in large areas of South America and Asia in 2013. The risk of resistance in target pests to this technology demands insect resistance management (IRM) programs.
View Article and Find Full Text PDFEffects of the insecticide flupyradifurone on Anticarsia gemmatalis caterpillar and its predator Podisus nigrispinus.
Environ Sci Pollut Res Int
July 2024
Departamento de Biologia Geral/BIOAGRO, Universidade Federal de Viçosa, Viçosa, 36570-900, Brazil.
The caterpillar Anticarsia gemmatalis (Lepidoptera: Noctuidae) is a prevalent pest in soybean plantations, managed using both natural and synthetic chemical products. However, the emergence of resistance in some populations emphasizes the need to explore alternative insecticides. Flupyradifurone, a neurotoxic insecticide, has not been previously used for controlling A.
View Article and Find Full Text PDFEffects of previous infestation with Bemisia tabaci MEAM1 on the resistance to Chrysodeixis includens in Bt and non-Bt soybean plants.
Braz J Biol
December 2023
Universidade Federal da Grande Dourados - UFGD, Faculdade de Ciências Agrárias, Programa de Pós-graduação em Agronomia, Laboratório de Fisiologia Vegetal, Dourados, MS, Brasil.
Transgenic Bt soybean plants have been developed to control insect pests, such as Anticarsia gemmatalis and Chrysodeixis includens. This objective has been achieved successfully; however, recently, some authors claimed that Bt soybean plants have been more susceptible than non-Bt soybean to Bemisia tabaci MEAM1. In addition, it is unknown whether Bt soybean plants infested by B.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!